Choose the one alternative that best completes the statement or answers the question. -Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 536 Hz. A microphone

Choose the one alternative that best completes the statement or answers the question.
-Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 536 Hz. A microphone is moved between the speakers along the line joining the two speakers with a
Constant speed of 1.60 m/s. What beat frequency is observed? The speed of sound in air is 343 m/s.
A) 5.00 Hz
B) 9.00 Hz
C) 7.00 Hz
D) 8.00 Hz
E) 6.00 Hz

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